本文件为用C语言实现的可实现广义异或问题的bp神经网络算法。该问题是对标准异或问题的推广。在标准异或问题中，输入X1和X2取离散量-1或+1，在广义异或问题中，输入（X1,X2）可以在区间[-1，+1] X [-1, +1]内任意取值，而输出为Y=sign(x1,x2)，其中sign()为符号函数，在区间[-1，+1] X [-1, +1]内随机产生500个训练样本.本程序用标准BP网实现该分类问题.-this document for the use of C language of achieving broad differences or problems bp neural network algorithm. The problem is different to the standard or the promotion. Differences in standards or issue, the importation of X1 and X2 from discrete or a -1, in the broadest sense of differences or problems, the input (X1, X2) in the interval [-1, 1] X [1, 1] arbitrary value. while output Y = sign (x1, x2), in which the sign () to sign function in the interval [-1, 1] X [1, 1] with randomly generated 500 samples. the standard procedure used in the BP Network classification.